Pencil



W. R. N05.

PENCIL.

APPLICATloN FILED MAY lo. 1920.

Patented Aug. 29, 192% WENTOH al). 74M,

/ TTOH/VEYS WITNESSES PATENT OFFICE.

WALTER R.NOE, OF NEW YORK, N. Y.

PENCIL.

Specification of Letters Patent.

Patented Aug. 29,y 1922.

Application led May 10, 1920. Serial No. 880,021.

T all wiz-om, t may concern.'

Be it known that I, WALTER R. Non, a citizen of the United States, and a resident of the borough and county of the Bronx, city and State of New York, have invented certain new and useful Improvements in Pencils, of which the following is a specification.

My invention relates to mechanical pencils and has for its object to provide a construction of extreme simplicity with a minithe pencil; Fig. 4 is a cross-section on the mum of parts and of relatively low cost and which includes a storage space for spare leads. The invention will be fully described hereinafter and the features of novelty will be pointed out in the appended claim.

In the accompanying drawings, which illustiate an example of my invention, Fig. 1 is a longitudinal section of the pencil; Fig. 2 is a view of the barrel; Fig. 3 is a perspective view'of a plug which may form part of line 4-1-4 of Fig. 1; Fig. 5 is a detail view of the cap and its corelated parts and Fig. 6 is a view illustrating the interior tube included in my pencil. p

As shown in the illustrated example, the pencil comprises a tubular barrel 10 ofsuitable material and formed with a tapering exis end 11, said barrel itself preferably having a uniformly smooth exterior surface. A tube 12 extends lengthwise of the barrel 10 and has its inner end secured interiorily thereof at the apex of the exit end 11 of said barrel 10 and is preferably split or quartered to frictionally hold the lead 13 as it protrudes from said barrel. The tube 12 has its outer end internally screw-threaded atv 14 and externally screw-threaded at 15, and at this end preferably .projects somewhat beyond the barrel 10 and screws into a plug 16 which frictionally fits intosaid barrel to close the chamber 19 and at the same time to fix said tube rigidly in position and properly center the same; the plug 16 is preferably formed with an vannular shoulder 17 to limit its normal movement into the barrel 10. In order-to still further increase the rigidity of the construction, a washer 18 may be placed upon the tube 12 within the barrel 10 and secured in position either by friction or otherwise, it being understood that the diameter of said washer is such as to frictionally it within said barrel and outsideof said tube. In addition to its other functions said Washer 18 may constitute the bottom of an annular chamber 19 which may be utilized as a storage space for spare leads 13. If desired, thls washer 18 alone may be relied upon to fix the tube 12 in position against vibration, 1n whlch case the plug 16 may be omitted. The means whereby the lead 13 is selectively proJected from the barrel 10 comprlses a stem 2O which extends into the tube 12 and is of relatively smaller diameter so as to befreel movable lengthwise thereof without inter erence. The stem `20 comprises an integral extension of a rod 21 which is externally screw-threaded to screw into said tube 12 and which is secured within a cap 22 so as to extend lengthwise thereof as shown 1n Flg. l, said cap 22 fitting over the barrel 10 and being movable lengthwise thereof. In the operative condition of the pencil or, in other words, when it is loaded, the stem 20 enga es a lead 13a located behind and in axlal a lgnment with the active lead 13 which is in use and the one end of which pro] ects beyond the exit end 11 of the pencil for wr1t1ng purposes. As the active lead 13 is worn down it is gradually advanced by rotating the cap 22 in a direction tocause the rod 21 to screw into the tube 12;

this brings about a forward movement of the stem 20 in an axial direction and causes it to exert a push upon the lead 13 whlch is communicated thereby to the active lead 13, the end of which is correspondingly projected from the exit end 11. During this advancing of the active lead 13 the cap 22 moves along the barrel 10 and nds a bearing thereon whereby the operation is eiciently carried out and vibration of the parts relatively to each other is avoided. en one'active lead 13 is consumed, it is preferred to advance the lead 13a until its one end projects beyond the exit end of the tube 12 and to insert a new lead into said .tube 12 after the rod 21 has been first completely unscrewed therefrom, it being understood that this proceeding is optional and that a consumed lead may be replaced in any other way suitable to the present pencil.

It will be understood that in some cases the stem 20 may be long enough to directly engage the active lead 13, thus doing away with the yextra lead 13a which is utilized as a pushing medium simply to maintain the parts of the cap within relatively small limits. c

The pencil i s very simple in Construction and eilicient i n operation and is readily and easily maintained 1n a serviceable conditlon;

i because of its extremely simple construction `and simplicity of operation the pencil is economical to produce and is not easily disarranged. The provision of the washer 18 at the bottom of the chamber 19 in which spare leads are stored, prevents these spare leads from becoming wedged in the tapering end 11 of the barrel 10.

Various changes in the specific form Y i shown and described 'may be made within tending lengthwise of said barrel and having its exit end permanently fixed therein in registry with the exit end of said barrel, said tube having its inlet end held in said plug and being arranged to contain an active lead, a cap movably fitted upon said barrel to complete the predetermined contour of said pencil7 a screw-threaded rod fixed with- 1n and extending lengthwise of said cap and arranged to screw into said tube, and a stem forming an axial extension of said rod and of smaller diameter than said tube, said stem being adapted to be moved lengthwise thereof, bythe action of said rod, to advance the active lead in said tube.

In testimony whereof II have hereunto set my hand.

WALTER- R. NOE. 

